Sumitomo Sumitube A2(3X) 9/3mm Flexible Polyolefin 3:1 Heat Shrink Tubing - Clear (By the Foot)

SUMITUBE A2(3X) is clear, flexible thin-wall polyolefin heat-shrink tubing for protecting components and light wire harness assemblies while keeping the underlying connection or label visible. This listing is the 9/3 mm size, supplied by the foot in a continuous length.

Order the length you need

Enter the number of feet needed in the quantity field. For example, quantity 25 means one continuous 25-foot length, not twenty-five individual pieces. The tubing supplied is Clear.

Choose the right fit

For the 9/3 mm size, the manufacturer lists a minimum supplied inside diameter of 9 mm and a maximum fully recovered inside diameter of 3 mm. Nominal recovered wall thickness is 0.80 mm.

The overexpanded 3:1 design helps the tubing pass over larger connectors or components before recovering around a smaller section. Choose a size that slides over the largest part and can recover snugly around the area being covered.

The 3:1 ratio describes diameter recovery, not a reduction to one-third of the original length. The manufacturer's longitudinal-change limit is +5% to -15%, so allow for possible length change when planning coverage.

Clear protection for visible connections

The flexible transparent material suits general-purpose insulation and protection where visual inspection matters. A2(3X) has a nominal recovery temperature of 110°C and an operating temperature range of -55°C to +135°C. Follow the manufacturer's heating instructions and the temperature limits of the wire, connector, label, and other materials underneath.

Do not select this clear A2(3X) tubing on the assumption that it carries the flame-retardant, UL, or CSA ratings of another SUMITUBE series. Choose a product with the documented ratings required by your application.

Specifications

• Series: SUMITUBE A2(3X)
• Nominal size: 9/3 mm
• Color: Clear
• Material: Flexible thin-wall polyolefin
• Nominal shrink ratio: 3:1
• Minimum supplied inside diameter: 9 mm
• Maximum recovered inside diameter: 3 mm
• Nominal recovered wall thickness: 0.80 mm
• Nominal recovery temperature: 110°C
• Longitudinal change: +5% to -15%
• Operating temperature: -55°C to +135°C
• Manufacturer specification reference: AMS-DTL-23053/5, Class 2, except dimensions and longitudinal change
• Manufacturer-listed material attributes: Halogen-free and lead-free; RoHS/RoHS 2 compliant
• Sales unit: By the foot, continuous length